<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			console.log(Number("hello world")) //NaN
			console.log(Number("")) // 0
			console.log(Number("11")) // 11
			console.log(Number("0011")) // 11
			console.log(Number("1.1")) // 1.1
			console.log(Number("12blue"))//NaN
			console.log(Number(undefined)) //NaN
			console.log(Number(true)) // 1
			console.log(Number(false)) // 0
			console.log(Number(null))	// 0
			console.log(Number(0xf)) // 15
		</script>
	</body>
</html>
